Question
Download Solution PDFThe process of superimposing message signal with the carrier wave is known as :
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
- The process of superimposing a message signal with a carrier wave is known as modulation.
- In modulation, the message signal is used to modify the characteristics of the carrier wave, such as its amplitude, frequency or phase, in order to carry information.
- The resulting modulated wave can then be transmitted through a communication channel, such as a radio frequency transmission system, where it can be received and demodulated to recover the original message signal.
- Modulation is a key technique used in many forms of communication, including radio, television, and digital communications.
Additional Information Need for Modulation:
1. It is needed in order to match the characteristics of the input signal to that of channel characteristics.
2. Multiplexing is made possible due to modulation.
3. Wireless transmission of low-pass signal is made possible due to modulation.
4. Practically realization antenna size can be achieved
5. Some modulation technique reduces the effect of noise on the signal.
Important PointsThe AM, FM, and PM output waveforms are as shown:
Last updated on Jul 4, 2025
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